The included NF1 samples had 20–86% females (one study included males only), 13–58% familial NF1 participants (27 studies reported the data, among which one included familial NF1 cases only and another, sporadic NF1 cases only), 8–77% diagnosed with ADHD (32 studies reported the data, among which five did not include any individuals with ADHD), and 10–71% diagnosed with ASD (12 studies reported the data, among which five did not include any individuals with ASD and two included only individuals with ASD). Here, NF1 is linked to attention deficit-hyperactivity disorder.